Blast optimization at Kriel Colliery J r n a - SciELO
Kriel Colliery (Anglo Coal) is situated on the northern margin of the Highveld Coalfield area in Mpumalanga, 55 km south of Witbank. The Number 4 coal seam is extracted through surface and underground mining methods. The underground operation was started in 1975 and is currently divided into six mechanized sections. The opencast was commissioned in